High quality Super Series are offered by us that include a Peck Deck Fly that is also known as butterflies are a great isolation exercise for the Pectoralis Major. The pec deck fly is safer than dumbbell flyes and people are less able to cheat. This can be a useful companion exercise to the machine bench press. It allows people to work their chest muscles through a greater range of motion while keeping the body well supported. A pec deck is a machine designed to increase strength and muscle mass in the chest. The Super Series includes the lat pulldown is a basic upper body strength exercise that targets the upper back. The exercise also improves stability in the lower back and core.